My friends make fun of me because I'm very obsessive-compulsive about certain things, but I wouldn't go so far as to say I need medical help. I just like things a certain way, although some of my oddities are a bit extreme.

For example, I need to have the school napkins stacked a certain way on my tray(because it doesn't stack evenly regularly). Also, I need folders/papers/anything else to be perfectly straight in a pile. No corners sticking out or anything askew or else I get aggitated and adjust the folders for ages. Mainly with me, I like alphabetizing like crazy and organizing by size, also to keep items in a perfectly flat pile.

Edit:
Thought I'd add that my father is mildly OCD, as in he'll spend hours fixing things that are already fixed because the "image isn't perfect" or "the paint isn't even".